journal article·2024-08Open access

Three Birds with One Stone: Multifunctional Separators Based on SnSe Nanosheets Enable High‐Performance Li‐, Na‐ and K‐Sulfur Batteries

Canhuang Li, Dawei Yang, Jing Yu, Jian Wang, Chaoqi Zhang, Tianxiang Yang, Chen Huang, Bingfei Nan, Junshan Li, Jordi Arbiol, Yingtang Zhou, Qiaobao Zhang, Andreu Cabot

Advanced Energy Materials· Volume 14· Issue 29

Abstract

Abstract Alkali metal‐sulfur batteries (MSBs) are one of the most promising next‐generation energy storage technologies due to their high energy density and potential for low cost. They are nonetheless constrained by the sluggish conversion of metal polysulfides (MPS) during the charge/discharge process. Herein, a multifunctional separator able to trap the MPS and catalyze their conversion in the three main MSB chemistries, Li‐, Na‐, and K‐MSBs, is demonstrated. More in detail, SnSe nanosheets are introduced as additive into the cathode side of the glass microfiber (GF) separator of the MSB. Taking lithium‐sulfur batteries (LSBs) as an example, it is demonstrated that the GF‐SnSe separator (GF@SnSe) shows strong chemical affinity to lithium polysulfides (LiPS) and superior catalytic activity, inhibiting the transport of LiPSs to the anode and accelerating their conversion. Combining experimental and calculation results, the SnSe additive is shown to decrease the Li2S decomposition energy barrier. Overall, GF@SnSe separators provide significantly improved LSB rate performance and cycling stability with a 0.049% capacity decay per cycle. Besides, the GF@SnSe separator promotes the electrochemical performance of sodium‐sulfur and potassium‐sulfur batteries. Overall, this work presents a significant advancement in the development of multifunctional separators in LSBs as well as the emerging Na‐S and K‐S systems.
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Research context

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Thermal Expansion and Ionic Conductivity

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Henan Province Key Laboratory of Photovoltaic Materials School of Future Technology Henan University Kaifeng 475004 P. R. China

Catalonia Institute for Energy Research‐IREC Sant Adrià de Besòs Barcelona 08930 Spain

Department of Chemistry Universitat de Barcelona Barcelona 08028 Spain

Catalan Institute of Nanoscience and Nanotechnology (ICN2) CSIC and BIST Campus UAB, Bellaterra Barcelona Catalonia 08193 Spain

Helmholtz Institute Ulm (HIU) D89081 Ulm Germany

College of Materials Science and Engineering Fuzhou University No.2, Xueyuan Road, Minhou County Fuzhou Fujian 350108 P. R. China

School of Environmental Engineering and Chemistry Luoyang Institute of Science and Technology Luoyang Henan 471023 P. R. China

Institute for Advanced Study Chengdu University Chengdu 610106 P. R. China

ICREA Pg. Lluis Companys Barcelona Catalonia 08010 Spain

National Engineering Research Center for Marine Aquaculture Marine Science and Technology College Zhejiang Ocean University Zhoushan Zhejiang 316004 China

State Key Laboratory of Physical Chemistry of Solid Surfaces College of Materials Xiamen University Xiamen Fujian 361005 P. R. China

Funding

National Natural Science Foundation of China · Generalitat de Catalunya · United Way of Bay Area

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